Add color and wrapping to cli help text (#3849)

sqlx-cli/src/opt.rs

@@ -1,11 +1,20 @@
 use std::ops::{Deref, Not};
 
-use clap::{Args, Parser};
+use clap::{
+    builder::{styling::AnsiColor, Styles},
+    Args, Parser,
+};
 #[cfg(feature = "completions")]
 use clap_complete::Shell;
 
+const HELP_STYLES: Styles = Styles::styled()
+    .header(AnsiColor::Blue.on_default().bold())
+    .usage(AnsiColor::Blue.on_default().bold())
+    .literal(AnsiColor::White.on_default())
+    .placeholder(AnsiColor::Green.on_default());
+
 #[derive(Parser, Debug)]
-#[clap(version, about, author)]
+#[clap(version, about, author, styles = HELP_STYLES)]
 pub struct Opt {
     // https://github.com/launchbadge/sqlx/pull/3724 placed this here,
     // but the intuitive place would be in the arguments for each subcommand.